Working barrel for pumps.



'0. A. WAITZ; WORKING BARREL FOB. PUMPS. APPLIOATION FILED MAR. 25, 1912.

Patented May 19, 19m

, awe/whoa CHARLES A WA|TZ imme/sow W COLUMBIA PLANOGRAPH 1:0.I WASHINGTON. D. e.

CHARLES A. WAITZ, or RoU'sEvILLE, PENNSYLVANIA.

WORKING BARREL FOR PUMPS.

Specification of Letters Patent.

Application filed March 25, 1912.

Patented May 19, 1914. Serial No. 686,043.

I '0 all whom it may concern:

Be it known that I, CHARLES A. VAITZ, citizen of the United States, residing at Rouseville, in the county of Venango and State of Pennsylvania, have invented certain new and useful Improvements in "Working Barrels for Pumps, of which the following is a specification.

The object of my invention is to provide an improved form of working-barrel cylinder, which may be used with fluid pumps of various sorts, and especially those which employ a piston having packing composed of one or more resilient cups, anc consists in so modifying the bore of such barrel or cylinder that said cups will be automatically caused to retain their elasticity for a much longer period than with the usual form'of barrel.

My invention is herein fully set forth and will be readily understood by a reference to the accompanying drawings, which form a part hereof, and which show a working barrel such as is commonly employed in oil wells in which my invention is employed. Said drawings are merely illustrative in a general way, however, of my inventive idea, as there are many other forms of pump barrels and cylinders to which my invention is applicable.

The figures of the drawings are as follows: Figure 1 shows a working barrel embodying my improvement, the piston being here shown for the purpose of illustrating the operation of my invention. Fig. 2 shows said barrel with the piston omitted, thus more clearly and precisely defining the construction by which my invention is embodied.

I11 all pumps where a piston is employed having a packing consisting of resilient cups, composed of various materials, the efficiency of such cups very soon decreases for various reasons, some of which are :In oil wells, where there is considerable salt water, the salt produces a hardening effect upon the cups, so that they soon loose their elasticity, and when this occurs, they wear rapidly and do not completely fill the barrel, then they must be renewed. In other classes of pumps, especially those used for farm and domestic purposes, it is a common occurrence for a pump to remain out of service for a considerable length of time, in which event the cup becomes dry and tends to contract somewhat,

and it will not, in this condition, produce the proper suction, and it is necessary to prime the pump, in order to make it start working.

My invention consists in providing an enlargement in the bore of the pump-barrel, through whichsaid packing cups pass or into which they enter at each reciprocation of the piston, and become thereby expanded somewhat, so that they are thus kept pliable and resilient, and when they reenter the normal bore of the barrel, they completely fill it and produce the proper action therein.

Referring to the drawings, the construction there shown is substantially as follows: The pump barrel is designated by the numeral l, and the enlargement in the bore 2 of the barrel is designated by the numeral 3, and in Fig. 1, the packing cups upon the piston are designated by the numeral 4.

One or more enlargements may be employed as desired, and their location may be such as will be conducive to the greatest efiiciency or best results; for instance, if the piston is one employing more than one cup 4, the enlargement should be so located that atleast one of the cups 'will be likely to occupy a position within the enlargement 3, when the pump is at rest; this will cause said cup to expand during said period of rest, and when the pump is again operated, at least one cup will be properly active, and after a few reciprocations or strokes, they will all become so. If the piston is one upon which but one cup is employed, it will be desirable that at least one of said enlarge- 1nents-if more than one are employed-Joe so positioned that the cup will occupy a position within said enlargement when the pump is at rest, thus permitting said cup to expand during this period; then when the pump starts operating, the cup will wholly fill the normal bore and produce the proper vacuum to raise the fluid or cause its on trance into the barrel and to elevate it therein.

My improvement is as suitable to application to air pumps as liquid pumps and is especially well suited to use with pumps employed for inflating tires of various kinds of vehicles.

I claim:

1. A barrel for pumps having an enlargement in that portion of the bore thereof in which the piston normally travels for the purpose set forth in combination with a piston having members adapted to conform to said enlargement when they are positioned therein.

2. A barrel for pumps having an enlargement in the bore thereof for the purpose set forth, in combination with a piston operative in said bore and having packing'consisting of resilient cups.

3. In a pump, the combination of a working barrel having an enlargement in its working surface; and a plunger operating over said surface, said plunger having a plurality of elastic packings, the packings being spaced on the plunger with relation to said enlargement of the barrel to bring less than the whole number of packings into register at the same time with the enlargement.

&. In a pump, the combination of a working barrel having an enlargement in its working surface; and a plunger operating in said working barrel, said plunger being provided with a plurality of packing cups, said cups being spaced with relation to the enlargement of the barrel to bring less than the whole number of cups into register with the enlargement at the same time.

In testimony whereof I ailix my signature in presence of two witnesses.

CHAR-LES A. lVAITZ.

lVitnesses:

H. G. JoHNsoN, A. L. MYERS.

Copies of this patent maybe obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

